import axios from 'axios';
import { Notification, MessageBox, Message, Loading } from 'element-ui';
import store from '@/store';
import { getToken } from '@/utils/auth';
import errorCode from '@/utils/errorCode';
import { tansParams, blobValidate } from '@/utils/ruoyi';
import cache from '@/plugins/cache';
import { saveAs } from 'file-saver';

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8';
// 创建axios实例
const service = axios.create({
	// axios中请求配置有baseURL选项，表示请求URL公共部分
	baseURL: process.env.VUE_APP_BASE_API,
	// 超时
	timeout: 30000,
});

// request拦截器
service.interceptors.request.use(
	(config) => {
		// 是否需要设置 token
		const isToken = (config.headers || {}).isToken === false;
		// 是否需要防止数据重复提交
		const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
		if (getToken() && !isToken) {
			config.headers['Authorization'] = 'Bearer ' + getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
		}
		// get请求映射params参数
		if (config.method === 'get' && config.params) {
			let url = config.url + '?' + tansParams(config.params);
			url = url.slice(0, -1);
			config.params = {};
			config.url = url;
		}
		if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
			const requestObj = {
				url: config.url,
				data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
				time: new Date().getTime(),
			};
			const requestSize = Object.keys(JSON.stringify(requestObj)).length; // 请求数据大小
			const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
			if (requestSize >= limitSize) {
				console.warn(`[${config.url}]: ` + '请求数据大小超出允许的5M限制，无法进行防重复提交验证。');
				return config;
			}
			const sessionObj = cache.session.getJSON('sessionObj');
			if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
				cache.session.setJSON('sessionObj', requestObj);
			} else {
				const s_url = sessionObj.url; // 请求地址
				const s_data = sessionObj.data; // 请求数据
				const s_time = sessionObj.time; // 请求时间
				const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
				if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
					const message = '数据正在处理，请勿重复提交';
					console.warn(`[${s_url}]: ` + message);
					// return Promise.reject(new Error(message));
				} else {
					cache.session.setJSON('sessionObj', requestObj);
				}
			}
		}
		return config;
	},
	(error) => {
		console.log(error);
		Promise.reject(error);
	}
);

// 响应拦截器
service.interceptors.response.use(
	(res) => {
		// 未设置状态码则默认成功状态
		const code = res.data.code || 200;
		// 获取错误信息
		const msg = errorCode[code] || res.data.msg || errorCode['default'];
		// 二进制数据则直接返回
		if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
			return res.data;
		}
		if (code === 401) {
			if (!isRelogin.show) {
				isRelogin.show = true;
				MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
					confirmButtonText: '重新登录',
					cancelButtonText: '取消',
					type: 'warning',
				})
					.then(() => {
						isRelogin.show = false;
						store.dispatch('LogOut').then(() => {
							location.href = '/index';
						});
					})
					.catch(() => {
						isRelogin.show = false;
					});
			}
			return Promise.reject('无效的会话，或者会话已过期，请重新登录。');
		} else if (code === 500) {
			Message({ message: msg, type: 'error' });
			return Promise.reject(new Error(msg));
		} else if (code === 601) {
			Message({ message: msg, type: 'warning' });
			return Promise.reject('error');
		} else if (code !== 200) {
			Notification.error({ title: msg });
			return Promise.reject('error');
		} else {
			return res.data;
		}
	},
	(error) => {
		console.log('err' + error);
		let { message } = error;
		if (message == 'Network Error') {
			message = '后端接口连接异常';
		} else if (message.includes('timeout')) {
			message = '系统接口请求超时';
		} else if (message.includes('Request failed with status code')) {
			message = '系统接口' + message.substr(message.length - 3) + '异常';
		}
		Message({ message: message, type: 'error', duration: 5 * 1000 });
		return Promise.reject(error);
	}
);

// 通用下载方法
export function download(url, params, filename, config) {
	downloadLoadingInstance = Loading.service({ text: '正在下载数据，请稍候', spinner: 'el-icon-loading', background: 'rgba(0, 0, 0, 0.7)' });
	return service
		.post(url, params, {
			transformRequest: [
				(params) => {
					return tansParams(params);
				},
			],
			headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
			responseType: 'blob',
			...config,
		})
		.then(async (data) => {
			const isBlob = blobValidate(data);
			if (isBlob) {
				const blob = new Blob([data]);
				saveAs(blob, filename);
			} else {
				const resText = await data.text();
				const rspObj = JSON.parse(resText);
				const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default'];
				Message.error(errMsg);
			}
			downloadLoadingInstance.close();
		})
		.catch((r) => {
			console.error(r);
			Message.error('下载文件出现错误，请联系管理员！');
			downloadLoadingInstance.close();
		});
}

export default service;
